Primecap Management
SEPN

Primecap Management’s Septerna Inc SEPN Stock Holding History

Primecap Management’s Portfolio SEPN Stock Details SEPN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$39.1M Buy
1,167,382
+118,548
+11% +$3.36M 0.02% 215
2026
Q1 		$25.2M Buy
1,048,834
+502,734
+92% +$13.2M 0.02% 226
2025
Q4 		$15.2M Buy
+546,100
New +$13M 0.01% 241

Other funds holding SEPN

RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
TGV
TRV GP V Boston, Massachusetts $498M AUM 267.53% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
TGV
TRV GP VI Boston, Massachusetts $232M AUM 247.08% 1-Year Est. Return
SB
Samsara BioCapital Palo Alto, California $1.22B AUM 242.83% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return
ACA
Avoro Capital Advisors New York $11.1B AUM 207.82% 1-Year Est. Return
JT
Jupiter Topco New York $245B AUM

Primecap Management's SEPN Position: Q2 2026 in Review

Primecap Management increased its Septerna Inc (SEPN) stake by 11% in Q2 2026, buying an estimated $3.36M and bringing the position to 1,167,382 shares worth $39.1M. The position accounts for 0.02% of the portfolio, ranked #215.

Primecap Management first reported a position in SEPN in Q4 2025 and has held it in 3 quarters since. 154 funds tracked by Wall St. Rank hold SEPN as of Q2 2026.

  • Primecap Management held 1,167,382 shares of Septerna Inc worth $39.1M as of Q2 2026.
  • Primecap Management bought 118,548 Septerna Inc shares in Q2 2026, an estimated $3.36M.
  • Septerna Inc made up 0.02% of Primecap Management's portfolio in Q2 2026, its #215 holding.
  • Primecap Management first reported a position in Septerna Inc in Q4 2025 and has held it in 3 quarters since.
  • 154 funds tracked by Wall St. Rank held Septerna Inc as of Q2 2026.

Based on Primecap Management's 13F filing for Q2 2026, filed 14 Aug 2026.